Installing cURL on Ubuntu 12.04

So I'm trying to add cURL to my droplet, and as other posts here just say to use
sudo apt-get install php5-curl
this gets all 404 errors from the ppa from this command and so it suggests that I try:
apt-get update
This goes fine, and a fair number of updates are retrieved.
Then when running the install again... the droplet goes down (off the net). Surfing to the IP or any subdomains I've pointed to it cannot be resolved. From the command line I'm unable to even restart apache cause it cannot find the apache directory. This was seriously not what I wanted.
I simply wanted to update cURL for php5, but I haven't found any answers on where to get a stable working version of cURL. Any help?

Short:
Ubunto packages were not in the same location because new Ubunto version was released. If you do not want to upgrade your Ubunto version then you have to change packages location with the above command and try apt-get update again. Finally you only have to run: